Studying predatory behaviour by crocodiles and their relatives such as alligators and caimans in the wild is notoriously difficult because they are ambush hunters, have slow metabolisms and eat much less frequently than warm-blooded animals.
To overcome these difficulties, Dinets used Facebook and other social media sites to solicit eyewitness accounts from amateur naturalists, crocodile researchers and nonscientists working with crocodiles.
He also looked through diaries of scientists and conducted more than 3,000 hours of observations himself.
The observations had something in common - coordination and collaboration among the crocodiles in hunting their prey.
"Despite having been made independently by different people on different continents, these records showed striking similarities. This suggests that the observed phenomena are real, rather than just tall tales or misinterpretation," said Dinets.